慎之又慎 shèn zhī yòu shèn — extremely cautious; to be doubly careful

Definitions

1. extremely cautious; to be doubly careful

Examples

• 此事干系重大，要慎之又慎。

  The matter is so weighty that one must be doubly careful.

• 实验安全，慎之又慎。

  In experimental safety, caution beyond caution is needed.